Types of activity

Sport - competitive activities that involve physical extension
Sport - have rules, regulations and an NGB
Physical activity - any body movement that works muscles and requires more energy than resting
Rules - followed throughout the game
Rules - usually upheld by an umpire/official/referee
Regulations - must be known/checked before any game/competition can begun eg. Rugby - stud length, netball - hoop height
NGB - national governing body